| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| IAIN | - | Scottish | ||
| IAIR | - | Biblical Latin, Biblical Greek | ||
| IAIROS | - | Biblical Greek | ||
| IAIRUS | - | Biblical Latin | ||
| IAKOB | - | Georgian | ||
| IAKOBOS | - | Biblical Greek | ||
| IAKOPA | - | Hawaiian | ||
| IAKOVU | - | Old Church Slavic | ||
| Ian | [iən] | |||
| IAN | EE-ən (English) | Scottish, English | ||
| IANCU | - | Romanian | ||
| IANTHA | - | Various | ||
| IANTHE | - | Greek Mythology | ||
| IANTO | - | Welsh | ||
| IANUARIUS | - | Ancient Roman |